| 摘要 |
PURPOSE:To perform efficient coagulation and flotation of oil in waste water by adding a cationic polymer coagulant and/or a combination of a cationic polymer coagulant with an anionic polymer coagulant all in powder condition to oil- contg. waste water to separate oil from water. CONSTITUTION:Separation of oil from water is performed by adding a cationic polymer coagulant and/or a combination of a cationic polymer coagulant with an anionic polymer coagulant, all in powdery condition, to oil-contg. waste water contg. >=500mg/l oil and forming an O/W or W/O type emulsion. The amt. of the polymer coagulant to be added is pref. 1-10pts.wt. per 100pts.wt. oil when a cationic polymer coagulant is used alone, and 1-5pts.wt. per 100pts.wt. oil when a combination of a cationic and anionic polymer coagulant is used. The pref. proportion of the cationic and anionic polymer coagulant used in combination is 1:10-10:1.
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